Download or read book Velocity Measurements for Turbulent Nonseparated Flow Over Solid Waves written by Kenneth Arthur Frederick and published by . This book was released on 1986 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-Doppler velocimetry measurements have been made of nonseparated velocity fields over solid sinusoidal wavy surfaces. Time-averaged velocity and turbulent intensity data are given. The measurements were conducted over waves on the bottom wall of a rectangular channel with a cross section of twenty four by two inches, the two inch dimension being vertical. Two sets of velocity data were obtained at conditions corresponding to flows where linear and nonlinear shear stress responses are observed. The conditions were wave steepnesses 2a lambda, and channel Reynolds numbers of 0.03125, 6400, and 0.05, 38,800 respectively. The wavelength of the waves was two inches. The viscous wall region was of particular interest. Sufficient measurements were taken to give an accurate representation of both the streamwise and normal variation of the viscous wall region. The data was Fourier analyzed to determine the extent of nonlinearities, the wavelength average flowfields, and the amplitudes and phases of the velocity responses. The physical meaning of the data is interpreted in terms of pressure gradient effects along the wave surfaces. Comparisons of the data with prediction from simple eddy viscosity models are also given. Keywords; Turbulent flow; waves; and Computer programs. (Thesis).
Download or read book Velocity Measurements for Turbulent Separated and Near Separated Flow Over Solid Waves written by John David Kuzan and published by . This book was released on 1986 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics of Gas Liquid Flows written by Thomas J. Hanratty and published by Cambridge University Press. This book was released on 2013-10-31 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unified theory of multiphase flows, providing tools for practical applications.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Statistical Theory of Turbulence and Measurements of Turbulent Velocity Components in Axisymmetric Liquid Flow written by Lawrence Morton Grossman and published by . This book was released on 1948 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Separated and Nonseparated Turbulent Flows about Axisymmetric Nozzle Afterbodies written by John A. Benek and published by . This book was released on 1979 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulence Measurements and Flow Modeling written by Ching Jen Chen and published by CRC Press. This book was released on 1987 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical and Applied Mechanics Report written by and published by . This book was released on 2005 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Flow written by Peter S. Bernard and published by John Wiley & Sons. This book was released on 2002-08-19 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides unique coverage of the prediction and experimentation necessary for making predictions. * Covers computational fluid dynamics and its relationship to direct numerical simulation used throughout the industry. * Covers vortex methods developed to calculate and evaluate turbulent flows. * Includes chapters on the state-of-the-art applications of research such as control of turbulence.
Download or read book Direct and Large Eddy Simulation I written by Peter R. Voke and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.
Download or read book The Summary of Engineering Research written by University of Illinois at Urbana-Champaign. Office of Engineering Publications and published by . This book was released on 1989 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Flow Over Small Amplitude Solid Waves written by Jonathan Abrams and published by . This book was released on 1984 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements were made of the variation of wall shear stress and of the root mean square level of the fluctuating shear stress along a solid wavy surface with an amplitude of 0.014 in. and a wavelength of 2 in. The phase angle associated with the spatial variation of the wave-induced shear stress passes through a well defined maximum when measured as a function of the dimensionless wave number, alpha = 2 pi nu/lambda u star. Measurements of the wall shear stress and in particular the location of this maximum provide an extremely sensitive test of turbulence models which pay particular attention to the viscous wall region. The use of a quasi-laminar assumption, whereby the wave induced changes of the Reynolds stresses are ignored, gives good agreement with the measurements of the variation of the wall shear stress for large values of alpha. An equilibrium turbulence assumption in which the wave induced Reynolds stresses are assumed to adjust instantaneously to changes in flow conditions along the wave surface is valid for only small values of alpha. In the range of 0.0005
Download or read book Government Reports Annual Index written by and published by . This book was released on 1986 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Flows written by G. Biswas and published by Narosa Publishing House. This book was released on 2002 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book allows readers to tackle the challenges of turbulent flow problems with confidence. It covers the fundamentals of turbulence, various modeling approaches, and experimental studies. The fundamentals section includes isotropic turbulence and anistropic turbulence, turbulent flow dynamics, free shear layers, turbulent boundary layers and plumes. The modeling section focuses on topics such as eddy viscosity models, standard K-E Models, Direct Numerical Stimulation, Large Eddy Simulation, and their applications. The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Special topics include modeling of near wall turbulent flows, compressible turbulent flows, and more.
Download or read book Proceedings written by and published by . This book was released on 2001 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
